Safety razor



Aug. 11,

J. G. COLEMAN SAFETY RAZOR Filed June 19. 1930 Qrr- 51 INVENTOR BY C 5:ATTORNEY Patented Aug. ll, @3531 stares innate J'AGQ'UES G. COLEMAN,WOODMERE, HEW 5203K, ASSI GN OB, BY ASSIGWKENTS,

TO GILLETTE SAFETY RAZQB CSIdlANi', E BOSTON, MASSACHUSETTS, A CQRPQEA-Lennon.

Application and time 19,

The present invention relates to that class of safety razors in whichtwo clamping members, a guard member and a blade backing member, areprovided, and a thin Q flexible blade is clamped between the guard andbacking members to retain the cutting edges of the blade in shavingrelation to the giiard teeth. The invention pertains more particularlyto that type of the above- El mentioned class of safety razors whereinthe blade backing member is hinged or pivoted to the guard member.

The main object of the present invention is to generally simplify theconstruction of razors or" the type above referred to, and to so designthe blade backing element its swinging into blade clamping positioncenters the blade on the guard member, thereby automatically bringing.the positioning 29 stud receiving apertures in the blade into registrywith the said studs as the latter are being moved toward the blade.

Another object or" the invention is to provide a safety razor of thetype above re- 25 ferred to, wherein the blade backing element is madeof two sections, which are hinged to the guard member and are com.-bined with means for shifting the same toward and for maintaining themin blade 39 clamping position.

A fur her objected the invention produce blade for co ogceration is zoror a,

With which T of the int" same consists in construction of parts herein?pointed out the 1 1 m 1 i ii ustr ateo oninan ing is be accomiesa.Serial at; 462,267.

Fi ure l is an end View, partly in section,

of a razor constructed in accordance with the present invention; Fig. 2is. a section taken on line '2-2 of Fig. 1; Fig. 3 is a top plan-view ofthe improved razor; Fig. iis a top plan View of the guard member of theconstruction; Fig. 5 is a top plan View of one oi the blade backingmember sections; Fig. 6 is a plan View of the improved blade; Fi '3' isa fragmentary per- SQQCiDiVG View of the blade and the means forshifting and maintaining the blade backing elements in blade clampingpositicn; and Fig. 8 is a section taken on line 8-8 oi Fig. 3 with theblade backing elements and their shifting means in other positions.

the drawings the numeral 10 indicates a guard member, provided withsuitable guard teeth 11 in its opposite longitudinal edges. From theunderi ace of this guard member extends centrally a tubular handle 12,-the bore of which is in alignment with a central hole 13 in said guardmember. in its longitudinal axis, the said guard member is provided oneach side of central hole 13 with an opening The openings 1d areequidistantly spaced from the hole 13. To the guard inem. er

attached by pivots 15 two blade baclring elements 16, each blade backingelement be g associated with two registering pivots which extend inparallel relation to the longitndinal axis or the guard member and aredisposed on the transverse edges of the latter adjacent the longitudinaledges thereof. The blade hacking sections are thus pivoted adjacenttheir outer longitudinal edges, heir inner longitudinal edges meeting inthe longitudinal center line of the guard member when in blade clampingposition (Figs. 1 and Each of the blade baclring sections is providedadjacent longitudinal edge with two down nro ecti g lugs J, throug whichLid underface of the latter two positioning studs 19, the studs on oneof said elements being, transversely of the guard member, in alignmentwith those on the other and being adapted to be extended through theguard openings 14 without contacting with the edges of the latter. Eachoi. the blade backing sections is provided centrally in its freelongitudinal edge with a notch 20, said notches being in alignment withone another and with the hole 13 in the guard member when the said bladebacking sections are in their blade clamping positions, shown in Figs. 1to 3, inclusive, of the drawings. With each notch 20 are associated inthe upper face of the respective blade backing sections recesses 21,adapted to receive the head 22 of a spindle 23, which extends slidablythrough the handle l2. @n this spindle is rotatably mounted a knurledsleeve 24-, which is oscillatahle upon the lower? or free end of saidhandle, the connection between the said elements being made by two pins25, which are fixed upon diametrically opposite portions of the lowerend of the handle 12 and'provided with heads 26, the latter projectingbeyond the outer face of the handle and being seated in cam slots 27 inthe said sleeve. As appears from Fig. l of the drawings, the centralhole 13 in the guard member is of non-circular configurw tion. Thatportion of the spindle 23 which extends through the said hole has acorre sponding cross-section, so that rotation of the spindle on theguard is prevented. The spindle is provided within the handle 12 with ashoulder 28. Against this shoulder and the pins bears a helical spring29, which is coiled about the said spindle and has a tendency to lockthe spindle .23 in its inner and outer positions, hereinafter to bedescribed.

The blade 30, to be mounted upon the 12 Z02 above described, is of thethin flexible type, having two cutting edges 31, and is provided with anaperture 32 which is in the form of a central longitudinal slot. Thisslot is provided with a central transverse enlargement 33, through whichthe head 22 of the spindle 23 is adapted to pass. This enlargement is,when the blade is mounted upon the razor, in alignment with the cen tralhole 13. The blade slot is furthermore provided on either side of thesaid central enlargement with. a transverse enlargement thelast-iiicntioned enlargements being )1' disposed ad acent the ends orthe slot and adapted to take each two rcgiing beingpositioning studs ofthe two bladc baclzing clement sectio s. The last-mentioned cularpruwutsa. 1 adapted to receive c .'lii1 lricul {HF} (lillcilc tvpc of XlGl heblacc.

The blade blade 15 in each cornei or t e estates provided a cut-awayportion 35, into which the lug 17 on a blade backing member section isadapted to enter.

When the blade is to be mounted upon the razor, assuming that the razorelements are in the positions indicated in Figs. 1 to 3, inclusive, ofthe drawings, the sleeve Ql is turned in the proper direction on thetuba la r handle 12 whereby the spindle 23 is raised to the positionshown in Fig. 8 of the drawings. -The backing element sections are thenswung around their pivots into the positions shown in dotted lines inFig. 8 of the drawings, the razor being then adapted to receive a blade.The blade is mounted upon the razor by extending the head 22 of thespindle 23 through the central transverse enlargement 33 of the bladeslot, the blade being placed upon the guard member of the device. Thatportion of the spindle which 'co-operatcs with the central transverseenlargement 33 of the blade slot has a trans verse cross-sectionto causethe blade to assume a substantially central position on the guardmember. The said blade, however, is not brought into shaving position onthe guard member due to the fact that in the mass production of razorblades fractional allowances for the variations to the standarddimensions must be ma'de,'and also the blade could not be properlyflexed if the transverse enlargement of this slot would fit exactly Vthe transverse cross-section of the spindle. Consequently, the blademust be centered upon the guard member to bring it into shaving relationto the guard teeth and also to receive the positioning lugs on the bladebacking element sections. This centering of the blade is etl'cctedautomatically by shifting the blade backing element sections from thepositions shown in dotted lines in Fig. 8 of the drawings into theposition shown in full lines therein.

As the said blade backing element sections are shifted in the directionsof the arrows shown in Fig. 8, their cam faces 18 engage the blade atthe edges 36 of the cutaway portions and thereby bring its cutting edgesinto shaving relation to the guard teeth and also placing the transverseenlargements 34 of the blade slot into the exact positions in which theyare adapted to receive the positioning studs 19. The said cam. faces areso shaped that, before the spindle head 22 is seated in the recesses 21in the outer faces of the backing clement sections and imn lately afterthe positioning studs have .ed the transverse culargt *nts 31' bladeslot. the mm faces are discngr from the cdg ll} oi" the cut-away poikoi351d the blade, so that, in the further downward movementof thepositioning s uds, the latter keep the blade in sharing tion on. theguard. is: the spindle is moved downwards, it causes Ill? lib.

,, which is underthe action of-the spring 29, malntaining the bladebacking element sections and the blade in shaving position on the guardmcmbcr.- he blade is, obviously, flexed inrthe ordinarym'anner while itis being clamped between the guard member and the backing element. Inorder to remove the blade, the operations abovedescrlbcd are 7 performedin the reverse order.

'lVhat I claim is 1. A safety razor, comprising a guard mcmbena handlethereon, two blade backing elements pivotally mounted upon said guardmember to meet in the longitudinal center line of the latter, a bladeadapted to be clamped between said guard member and said blade backingelements,*said blade having positioning stud receiving apertures, twopositioning studs adjacent the free longitudinal edge of each of saidblade backing elements adapted to enter said blade apertures, and meansmountedo'n saidhau dle for locking said blade backing elements in bladeclamping position.

2. A safety razor comprising a guard member, atubular handle thereon,two blade backing elements pivotally' mounted upon said guard member tomeet inthe longitudinal center line of the latter, a blade adapted to beclamped between said guardmember and said blade backing elements, saidblade having positioning stud receiving apertures, two positioning,studs adjacent the free longitudinal edge of each of said blade backingelements adapted to enter said apertures, and means extending throughsaid handle for locking said blade backing elements in blade clampingposition, said blade having an aperture through which saidlast-mentioned means is adapted to pass.

3. A safety razor according to claim 1, comprising means on said bladebacking elements for centering said blade onsaid guard member beforesaid positioning studs enter said apertures.

i. A safety razor according to claim 2, comprising means on said bladebacking elements for centering said blade on said guard member beforesaid positioning studs enter said positioning stud receivingapertures. V

5. in a safety razor according to claim 1, comprising means on saidblade backing elements for centering said blade on said guard memberbefore said positioning studs enter said apertures, said centering meansbeing disengaged from said blade after said positioning studs haveentered said apertures.

6. A safety razor according to claim 2, comprising means on said bladebacking elements for cente'ringsaid blade on said guard member beforesaid positioning studs enter said"po sitioning stud receiving apertures,said centering means being disengaged from said blade after saidpositioning studs have. entered said apertures.

7. A safety razor comprising a guard member, a handle thereon, two bladebacking elements pivotally mounted upon said guard member to meet in thelongitudinal center line of the latter, a blade adapted to be clampedbetween said guard member and said blade backing elements, said bladehaving positioning stud receivin apertures and a cut-out portion ineach'ot its corners, two positioning studs adjacent the treelongitudinal edge of each of said blade backing elements adapted toenter said blade apertures, n1eans mounted on said handle for lockingsaid blade backing elements in blade clamping positions, and lugs onsaid blade backing elements adapted to enter the cut-out portions ofsaid blade, said lugs having cam faces for co-operation with the bladeto center the latter on said guard member prior to the entry of saidpositioning studs into said apertures.

8. in a safety razor according to claim 7, said cam faces being shapedto release said blade as soon as said positioning studs commence theirpositioning operation.

9. A safety razor comprising a guard member, a handle thereon, two bladebacking elements pivotally mounted upon said guard member to meet in thelongitudinal center line of the latter, a blade adapted to be clampedbetween said guard member and said blade backing elements, said bladehaving positioning stud receiving apertures, two positioning studsadjacent the free longitudinal edge of each of said blade backingelements adapted to enter said blade apertures, means mounted on saidhandle for maintaining said blade backing elements in blade clampingpositions, and lugs on said blade clamping elements having cam faces forco-operation with the blade to center the latter on said guard memberprior to the entry of said positioning studs into said apertures.

10. in a safety razor according to claim 9, said cam'taces being shapedto release said blade as soon as said positioning studs commence theirpositioning operation.

11. A safety razor comprising a guard member, a handle thereon, twoblade backing elements pivotally mounted upon said guard member to meetin one of the center lines of the latter, a blade adapted to be clampedbetween said guard member and said blade backing elements, said bladehaving positioning stud receivin apertures, po-

sitioning studs on said blac e backing elements adapted to enter saidblade apertures, and means mounted on said handle for mainclampingposition,

15 me d y of a 12. A safety 1 2mm" eceerc'ting "50 eisim 11 comprisingmeans 0111 said blade backing e lements for centering said blade onsaicl guard member before said pesisioning studis enter said apertures.A

13. A safety mzer according t0 claim 11 comprising means on said bladebacking" elements for-centering said Made on said guard member beforessicl pesitiening semis enter said apertures, said centering means beingdisengaged from said blade seid pa sitioning studs have entered semiapertures.

Signed at New Y 0T1: Ciel the eeumzy of New York ef New 1 0E13 this emme

